Hoisting apparatus.



PATBNTED SEPT-13, 1904.

C. W. HUNT.

HOISTING APPARATUS.

APPLICATION FILED NOV. 19, 1903.

N0 MODEL.

UNTTED STATES Patented September 13, 1904.

CHARLES W. HUNT, OF NEW YORK. N. Y.

HOISTING APPARATUS.

SPECIFICATION forming part of Letters Patent No. 769,904, dated September 13, 1904:,

Application filed November 19, 1903. Serial No. 181,816. (No model.)

To all whom it may concern:

Be it known that I, CHARLEsWALLAoE HUNT, a citizen of the United States, residing in West New Brighton, in the borough of Richmond, in the city of New York, in the State of New York,have invented certain new and useful Improvements in Hoisting Apparatus, of which the following is a specification, reference being had to the accompanying drawings, forming a part hereof.

In another application, filed November 11, 1903, Serial No. 180,653, there is shown and described a hoisting apparatus in which the two drums of the hoisting mechanism are mounted loosely and are engaged by an equalizinggear to which the power is applied, brakes being provided for the equalizing-gear and for the two drums, respectively. In the drawings of said application the two drums are represented as mounted upon the same shaft with the equalizing-gear and on opposite sides of such gear. Obviously in such an arrangement the leads of the two ropes to the drums are necessarily separated, whereas in some cases the advantage of having the drums mounted upon the same shaft with the equalizing-gear may be offset by the desirability of having the leads of the two ropes in some other desired relation. It may also be to advantage to reduce materially the size of the equalizing-gear.

It is accordingly the object of the presentinvention to provide for such a combination and arrangement of the equalizing-gear and the drums as shall enable these desired results to be accomplished.

The invention will be more fully described hereinafter with reference to the accompanying drawings, in which it is illustrated, and in which- Figure l is a view in elevation, largely diagrammatic, of a hoisting apparatus which embodies the invention. Fig. 2 is aview, partly in elevation and partly in vertical section, showing, on a larger scale, the hoisting-drums and their arrangement. Fig. 3 is a detail view showing the sheaves on the boom-truck and running or hook block and the arrangement of the ropes.

The boom or track a may be arranged as usual and may be adapted to permit the travel thereon of the usual boom truck or trolley b. It may also support the usual guide-sheaves 0, c, and 0 over which the ropes d and a pass from the respective winding-drums f and g, the rope d passing over the sheave 0 and thence about the multiple sheaves Z) on the boomtruck and the multiple sheaves it and being finally secured to the running or hook block or to the truck, as may be desired. The rope 6 passes over the sheaves c at the inner end of the boom and thence about the sheave c at the outer end of the boom and about the multiple sheaves b and if on the boom-truck and running-block, respectively, being finally secured to the running-block or to the truck, as may be preferred. The sheaves 5 and k are arranged similarly to the sheaves 7) and it, as shown in Fig. 3, and need not be separately illustrated. The drurnsf and 9 may be loosely mounted, as in said former application; but instead of being supported upon a common shaft with the equalizing-gear they are supported independently of the equalizing-gear, as upon shafts f and g and may be connected through gears f and 9", formed upon the drums, or secured to the supportingshafts, as the case may be, with pinions f and g, which are mounted loosely upon the shaft 2' and are respectively secured to or are formed with bevel-gears f and g also loose on the shaft 2' and severally engaged by the equalizing-gear K of ordinary construction, which is fast upon the shaft Power may be applied to the equalizing-gear through the shaft vi from a motor Z or driving means of any suitable character by gears m and a of ordinary description. It will be observed that this arrangement and combination of parts not only permits the drums to be so placed relatively as to give the respective ropes any desired relative lead, but it also permits the equalizinggear to be of small diameter as compared with the drums. A brake 0 is provided for the equalizing-gear and may be applied directly thereto or to a brake-drum 0, secured at some convenient point to the shaft 6 or otherwise. Brakes f and g, also of ordinary description, are also provided for the drums f and r The hoisting-ropes are shown in this case as arranged in the same manner as described in said application, and such arrangement is not particularly concerned with the present invention; but it will be described herein with reference to the drawings in order that the present specification may be complete in itself. As shown in the drawings, there are provided on the boom-truck for each rope four sheaves and on the running-block three sheaves, so that there are seven parts to each rope to support the load. It will be obvious, however, that a greater or less number of parts of the rope supporting the load might be provided and that the sheaves may be grouped and arranged in any convenient manner. The two ropes cl and e are wound upon the drumsf and g in the same direction, and as a consequence both drums will be stationary and the load will also be stationary whenever the equalizinggear K, which is in operative engagement with both bevel-gears f and g and through them with the drums, as clearly shown in Fig. 2, is held from rotation by its brake 0. Furthermore, it the equalizing-gear be rotated while both drums fand g are free the load will be hoisted vertically while the free truck is stationary on the boom. If, however, the drum g be held stationary by its brake while the equalizing-gear is operated, it will be observed that through the operative engagement of the equalizing-gear with both drums, as already described,the drum f will be rotated at greater speed than that of the equalizing-gear, and the load will be drawn inwardly. The boomtruck under these conditions will of course run horizontally on the boom; but as the load is supported from the boom-truck by a multiple number of parts of each rope, in the present instance seven, the load will moveinward and upward at an angle with the boom of one in seven. On the other hand, if the direction of rotation of the equalizing-gear be reversed and the drumf be held from rotation, the rope 6 being then paid out by the drum 9, the load will move inward and downward at an inclination of one in seven. By a suitable regulation of the direction of rotation of the equalizing-gear and the application of the brake to one or the other of the drums f and g it will be obvious that the load can also be moved outward as well as inward at an inclination of one in seven either upward or downward;

I claim as my invention 1. In a hoisting apparatus, the combination of an equalizing-gear, two drums mounted on axes independent of the equalizinggear,transmitting-gearing between each of said drums and the equalizing-gear, and means to apply power to the equalizing-gear, substantially as shown and described.

2. In a hoisting apparatus, the combination of an equalizing-gear, two drums mounted on axes independent of the equalizing-gear, loosely mounted bevel-gears in engagement with said equalizing-gear, transmitting-gearing between the bevel-gears and said drums respectively, and means to apply power to the equalizing-gear, substantially as shown and described.

3. In a hoisting apparatus, the combination of an equalizing-gear, two drums mounted on axes independent of the equalizinggear,trans Knitting-gearing between each of said drums and the equalizing-gear, means to apply power to the equalizing-gear, and brakes for said equalizing-gear and for said drumsrespec tively, substantially as shown and described. This specification signed and witnessed this 11th day of November, A. D. 1903.

CHARLES W. HUNT.

In presence oi' JOHN F. SMITH, GEO. S. HUMPHREY. 

